tetra
noun
any of several tropical, freshwater fishes of the family Characidae, often kept in aquariums.
tetras
-
pluralof tetra.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
This group spans more than 10,000 species, from catfish to aquarium favorites such as tetras and zebrafish.
From Science Daily ● Nov. 3, 2025
I didn’t see the usual darting of neon tetras, and the guppy tanks were all dark.
From "Please Ignore Vera Dietz" by A.S. King
Even the couroucous were invisible, and it seemed likely that the sailor would be obliged to return to that swampy place where he had fished for tetras with such good luck.
From The Mysterious Island by White, Stephen W.
Pencroff had found in the grass half-a-dozen tetras nests, with two or three eggs in each.
From The Mysterious Island by White, Stephen W.
A good half hour passed, but as the sailor had foreseen, several pairs of tetras returned to their nests.
From The Mysterious Island by White, Stephen W.
